Vitalik Buterin and Anatoly Yakovenko clash over Ethereum’s Layer-2 security

Vitalik Buterin and Anatoly Yakovenko debate whether Ethereum’s Layer-2 networks really guarantee security and decentralization.

A public exchange between Ethereum co-founder Vitalik Buterin and Solana co-founder Anatoly Yakovenko has gained attention in the X-crypto community.

The debate focused on the level of security offered by Ethereum’s Layer 2 (L2) networks.

Security and centralization risks

Buterin recently defended Ethereum’s L2 architecture on X, proverb that even if 51% of validators collude or experience a software bug, they cannot steal user assets. However, he acknowledged that there are limitations if the validator set entrusts tasks that are outside the chain’s control. He explained that in such a scenario, more than half of them could collude and give a false answer without any recourse.

Yakovenko challenged this view, arguing that the claim that L2s inherit Ethereum’s security is false. “The promise of L2s!= the reality of L2s,” he wrote. He pointed out that Wormhole ETH on Solana faces the same worst-case risks as ETH on Base five years after the start of the L2 roadmap, while generating similar revenue for ETH L1 stakers.

The co-founder of Solana suggested that there is an inherent flaw in the networks that makes achieving the desired security difficult. He highlighted some key problems with the way L2s function today. Their complex codebases create broad attack surfaces that are difficult to thoroughly control.

Multisig custodian settings can also allow funds to be moved without user consent when signers collude or are compromised. Furthermore, off-chain execution systems concentrate too much control in a few hands, undermining the decentralization that blockchain is designed to maintain.

Yakovenko introduces Ethereum as Solana Layer-2

Yakovenko does suggested creating a dedicated bridge that would allow Ethereum to work as layer-2 on Solana to allow for smooth movement of assets between the two. He noted that this approach requires no changes to the blockchain itself, and as on-chain zero-knowledge proofing research continues to develop, the process will become even easier.

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Ethereum currently supports over a million active validators, far more than Solana’s estimated 2,000. Supporters such as crypto lawyer Gabriel Shapiro to believe that this broad validator base strengthens protection against coordinated attacks.

He explained that many critics misunderstand or deliberately ignore that L2s are not simple servers running a blockchain. Because they are linked to Ethereum, specific transactions can be enforced within blocks, meaning that decentralization at their level is not necessary as the network itself takes care of that security.